Global law firm Greenberg Traurig has deployed the next generation of CoCounsel Legal, Thomson Reuters' agentic AI for legal professionals, across its global offices. The rollout gives roughly 3,200 lawyers access to AI that can plan, research, and draft across a matter, building on four years of early access and beta testing collaboration between the two companies.
The deployment signals a shift in how large firms are putting AI to work. Rather than using AI to generate standalone answers, Greenberg Traurig lawyers can now use a system that reasons through legal issues, adapts as new facts emerge, and produces drafts with citations grounded in Westlaw and Practical Law content.
How the AI handles legal work
The next generation of CoCounsel Legal plans an approach, retrieves authoritative content, and drafts with citations, adjusting mid-workflow as new facts emerge. Every output is grounded in Westlaw and Practical Law content, guided by 35 million West Key Number classifications and 3.9 million Precision Research attributes. The system's reasoning and citations are designed so attorneys can inspect them rather than accept them at face value.
Brief Builder extends this further, turning that grounded research directly into a structured, court-ready draft brief. The integration with DeepJudge also helps lawyers access firm knowledge alongside the legal research tools.
"What distinguishes Greenberg Traurig is not technology alone, but the talented professionals who use it to help solve complex challenges for our clients," said Brian L. Duffy, the firm's chief executive officer. "By combining this technology with the experience and judgment of our lawyers, we are enhancing our ability to deliver efficient, forward-looking, and client-centered legal services."
Guardrails and governance
Greenberg Traurig has set up a governance framework centered on responsible AI use. Clients are told that lawyers use AI on their matters, and AI-generated work products are reviewed by the lawyers handling the matter and by supervising shareholders before reaching a client.
The firm applies information security and due diligence protocols to each AI tool it deploys. These protocols are designed to ensure that AI models do not train on client data and that data rights and confidentiality obligations are respected at every stage.
"The legal industry is moving beyond AI that simply generates answers, and Greenberg Traurig's deployment shows what that shift looks like in practice," said Raghu Ramanathan, president of Legal Professionals at Thomson Reuters. "The next generation of CoCounsel Legal helps its lawyers turn insight into action by combining trusted legal content, agentic intelligence, and workflow execution in a single experience, grounded in the transparency and accountability of our Fiduciary-Grade AI™ standard."
For legal professionals evaluating similar tools, the firm's approach to AI for Legal work offers a template: early involvement in product development, clear client disclosure policies, and human review of all AI output. Legal support staff may find the firm's workflow instructive as well - an AI Learning Path for Paralegals covers similar ground on how AI fits into daily legal work.
Why this matters for legal professionals
This deployment is a concrete example of agentic AI moving from pilot programs into firm-wide production. The key takeaway for lawyers and legal staff is the emphasis on inspectable reasoning: the system shows its work through citations and classifications, and a human lawyer reviews everything before it goes to a client. That structure - AI doing the heavy lifting on research and drafting, with lawyers checking the output - is likely to become the standard model for legal work in firms of all sizes.
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